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Active welding method and activating agent for aluminum and aluminum alloy

A welding method and aluminum alloy technology, which is applied in the direction of welding medium, welding equipment, welding equipment, etc., can solve the problem of unsatisfactory increase of penetration depth and other problems

Inactive Publication Date: 2009-01-21
LANZHOU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can ensure that the weld surface is well formed, the effect of increasing the penetration depth is not ideal

Method used

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  • Active welding method and activating agent for aluminum and aluminum alloy
  • Active welding method and activating agent for aluminum and aluminum alloy
  • Active welding method and activating agent for aluminum and aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0013] AC FZ-TIG welding is used for welding, the gap between the coatings on both sides is 4mm, and the total width of the coatings on both sides and the middle coating is greater than 20mm. The welding specifications are shown in Table 1. Before welding, dissolve the active agent with acetone, stir it into a paste, and then apply it evenly on the surface of the workpiece with a brush to cover the original metallic luster. After the acetone is completely volatilized, perform conventional TIG welding.

[0014] Table 1 welding specification parameters

[0015]

[0016] The welding specification parameters in Table 1 are used for welding. The weld penetration depth of traditional TIG welding is 1.8-2.2mm, the fusion width is 9.2-10.0mm, and the weld cross-section is as follows: figure 1 shown. When using the welding specification in Table 1 for FZ-TIG welding, the coating on both sides is made of SiO 2 , the active agent formulation of the intermediate coating and the wel...

no. 2 example

[0023] For AC FZ-TIG welding, the composition and mass percentage of the intermediate coating active agent is ZnF 2 10%, MnCl 2 45%, CdCl 2 30%, Te 15%, SiO coating on both sides 2 . The gaps between the coatings on both sides are 4mm, 6mm, 8mm and 10mm respectively, and the total width of the coatings on both sides and the middle coating is greater than 20mm. Before welding, dissolve the active agent with acetone, stir it into a paste, and then apply it evenly on the surface of the workpiece with a brush to cover the original metallic luster. After the acetone is completely volatilized, conventional TIG welding is performed. The welding specifications are shown in Table 1. The weld penetration and penetration width of AC FZ-TIG welding are shown in Table 4.

[0024] Table 4 Weld penetration depth and width at different coating gaps

[0025]

no. 3 example

[0027] For AC FZ-TIG welding, the composition and mass percentage of the intermediate coating active agent is ZnF 2 10%, MnCl 2 45%, CdCl 2 30%, Te 15%, SiO coating on both sides 2 , the gap between the coatings on both sides is 4mm, and the total width of the coatings on both sides and the middle coating is greater than 20mm. Before welding, dissolve the active agent with acetone, methyl ethyl ketone and ethanol respectively, stir it into a paste, and then apply it evenly on the surface of the workpiece with a brush to cover the original metallic luster. After the acetone, methyl ethyl ketone or ethanol are completely volatilized, conventional TIG welding is performed. The welding specifications are shown in Table 1. The weld penetration and penetration width of AC FZ-TIG welding are shown in Table 5.

[0028] Table 5 Weld penetration depth and width at different coating gaps

[0029]

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Abstract

The invention discloses an active welding method for aluminum and aluminum alloy and a surfactant. The main component of the surfactant is halide with low melting point, low boiling point and low electrical resistivity. Before the traditional TIG welding, the surfactant is coated evenly on the central area of on the surface of a welding bead to be welded. The width of the surfactant coating is not more than 10mm; a surfactant with high melting, high boiling point and high electrical resistivity is coated at both sides of the surfactant in the area respectively. The total width of the coating at both sides and in middle is more than 20mm, the surfactant of the coating at both sides is SiO2; the surfactant of the coating in middle consists of ZnF2, MnCl2, CdCl2 and Te, the weight percentage content is 5 percent to 15 percent of ZnF2, 40 percent to 55 percent of MnCl2, 20 percent to 35 percent of CdCl2 and 5 percent to 20 percent of Te.

Description

technical field [0001] The present invention relates to active soldering methods. Background technique [0002] The active welding method is a new high-efficiency and energy-saving welding technology with great development and application value. It coats a thin layer of surfactant on the surface of the bead to be welded, thereby causing the welding arc to shrink or the liquid metal in the welding pool The change of the flow state can make the welding penetration more than twice that of the traditional welding method. The active welding method was first applied to tungsten argon arc welding (TIG welding, Tungsten Inert Gas Welding), and the concept of A-TIG (Activating flux TIG) welding has been formed. Because of its outstanding features such as low energy consumption, high efficiency, high quality, easy operation and environmental protection, it has attracted great attention worldwide. At present, A-TIG welding has been successfully applied to titanium alloy, stainless st...

Claims

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Application Information

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IPC IPC(8): B23K9/16B23K9/235B23K35/22
Inventor 黄勇樊丁
Owner LANZHOU UNIVERSITY OF TECHNOLOGY
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